Insulating film, battery and electric equipment
By designing multiple crease lines and cut lines on the insulating film, the curling problem at the corners of the top or bottom surface of the battery is solved, and the flat fit between the insulating film and the battery surface is achieved, and the insulation performance is improved.
Patent Information
- Application Number
- CN202421808508.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-07-29
AI Technical Summary
In the prior art, the insulating film of the battery case is prone to lift up in the three-layer overlapping area at the corner of the top surface or bottom surface, resulting in poor bonding without glue and affecting insulation performance.
Design an insulating film with multiple crease lines and cut lines. Through the design of folding and cut lines in specific directions, the insulating film is smoothly fitted at the corners of the top or bottom surface of the battery, and avoid overlapping of glue.
It effectively reduces the risk of insulating film lifting, ensures a flat fit between the insulating film and the battery surface, and improves insulation performance.
Smart Images
Figure CN223181356U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of energy storage devices, in particular to an insulating film, a battery and electrical equipment. Background Art
[0002] Currently, battery casings are generally made of aluminum or stainless steel. To prevent short circuits, an insulating film needs to be attached to the outer surface of the battery. To improve the overall insulation performance of the battery, the insulating film will extend to the top and bottom surfaces of the battery, that is, the insulating film will be folded over to the top or bottom surface of the battery to form a folded edge. The folded edge of the insulating film will form a three-layer overlapping area at the corner of the top or bottom surface of the battery, and two of the three-layer overlapping areas will inevitably be glue-free, causing the three-layer overlapping area to easily warp. The warping of the three-layer overlapping area will cause the surrounding areas to warp. Utility Model Content
[0003] Based on this, it is necessary to provide an insulating film, battery and electrical equipment that improve the above defects in order to address the problem that the folded edge of the insulating film in the prior art will have three overlapping areas at the corners of the top or bottom surface of the battery, and the three overlapping areas must have two non-glue surfaces bonded, which makes the three overlapping areas easy to warp up, and the warping of the three overlapping areas will cause the surrounding areas to warp up.
[0004] An insulating film having a first crease line and two second crease lines, wherein the first crease line passes through two sides of the insulating film along a first direction, the two second crease lines are located on the same side of the first crease line and both extend longitudinally along a second direction intersecting the first direction, and one end of each second crease line is connected to the first crease line;
[0005] The insulating film is divided by the first crease line and the two second crease lines to form a first side covering area, two third side covering areas and a first folding area, the first side covering area is located between the two second crease lines, the two third side covering areas are respectively located outside the two second crease lines, and the first folding area is located on the side of the first crease line away from the two second crease lines;
[0006] The insulating film also has a first edge located on the side of the first fold line away from the two second fold lines and two first cutting lines located in the first fold area, the two first cutting lines correspond one-to-one to the two second fold lines, one end of each first cutting line is located at the first edge, and the other end of each first cutting line extends toward the position where the corresponding second fold line is connected to the first fold line.
[0007] In one embodiment, each of the first cutting lines is inclined relative to the corresponding second crease line toward a side closer to another second crease line; or
[0008] Each of the first cutting lines is inclined away from the other second crease line relative to the corresponding second crease line; or
[0009] Each of the first cutting lines is parallel to the corresponding second crease line.
[0010] In one embodiment, there is a spacing between the end of the first cutting line away from the first edge and the position where the corresponding second crease line and the first crease line are connected.
[0011] In one embodiment, the insulating film further has a third crease line and two fourth crease lines that penetrate both side edges of the insulating film along the first direction. The two fourth crease lines are located between the first crease line and the third crease line. Each end of the second crease line away from the first crease line is connected to the third crease line;
[0012] The region of the insulating film between the two second crease lines is separated by the first crease line, the two fourth crease lines, and the third crease line into a first side covering area, a bottom covering area, a second side covering area, and two fourth side covering areas. The bottom covering area is located between the first side covering area and the second side covering area. The two fourth side covering areas are located between the adjacent third crease line and the fourth crease line, and are respectively located outside the two second crease lines.
[0013] In one embodiment, the insulating film is separated by the third crease line to form a second crease border area on the side of the third crease line away from the two second crease lines; the insulating film further has a second edge on the side of the third crease line away from the two second crease lines and two second cutting lines located in the second crease border area. The two second cutting lines correspond to the two second crease lines one by one. One end of each second cutting line is located at the second edge, and the other end of each second cutting line extends towards the position where the corresponding second crease line is connected to the third crease line.
[0014] In one embodiment, each of the second cutting lines is inclined towards the other second crease line relative to the corresponding second crease line; or
[0015] Each of the second cutting lines is inclined away from the other second crease line relative to the corresponding second crease line; or
[0016] Each of the second cutting lines is parallel to the corresponding second crease line.
[0017] In one embodiment, there is a spacing between the end of the second cut line facing away from the second edge and the position where it is connected to the corresponding second fold line and the third fold line.
[0018] A battery includes a battery body and the insulating film as described in any one of the foregoing embodiments. The battery body has a first side, a third side, a fourth side, and a top surface.
[0019] The insulating film wraps the battery body to form a use state. In the use state, the first side covering area wraps the first side. The two third side covering areas are respectively folded along the two second fold lines to respectively wrap parts of the third side and the fourth side. The first folding edge area is folded along the first fold line to cover the periphery of the top surface.
[0020] An insulating film has a first fold line and four second fold lines. The first fold line runs through both sides of the insulating film along a first direction. The four second fold lines are on the same side of the first fold line and all extend longitudinally along a second direction intersecting the first direction. One end of each second fold line is connected to the first fold line.
[0021] The area of the insulating film on the side of the first fold line facing the four second fold lines is divided by the four second fold lines into two fourth side covering areas, a first side covering area, a third side covering area, and a second side covering area. One of the fourth side covering areas, the first side covering area, the third side covering area, the second side covering area, and the other fourth side covering area are arranged in sequence along the first direction.
[0022] The area of the insulating film on the side of the first fold line facing away from the four second fold lines is a first folding edge area. The insulating film also has a first edge on the side of the first fold line facing away from the four second fold lines and four first cut lines corresponding to the four second fold lines and located in the first folding edge area. One end of each first cut line is located at the first edge, and the other end of each first cut line extends towards the position where the corresponding second fold line is connected to the first fold line.
[0023] In one embodiment, each first cut line is inclined relative to the corresponding second fold line; or
[0024] Each first cut line is parallel to the corresponding second fold line.
[0025] In one embodiment, there is a spacing between one end of each of the first cutting lines, which faces away from the first edge, and the position where it is connected to the corresponding second crease line and the first crease line.
[0026] In one embodiment, the insulating film further has a third crease line that penetrates both side edges of the insulating film along the first direction, and the four second crease lines are located between the first crease line and the third crease line;
[0027] The area of the insulating film on the side of the third crease line that faces away from the four second crease lines is the second crease area. The insulating film further has a second edge located on the side of the third crease line that faces away from the four second crease lines, and four second cutting lines located in the second crease area and corresponding to the four second crease lines one by one. One end of each second cutting line is located at the second edge, and the other end of each second cutting line extends towards the position where the corresponding second crease line is connected to the third crease line.
[0028] In one embodiment, each of the second cutting lines is inclined relative to the corresponding second crease line; or
[0029] Each of the second cutting lines is parallel to the corresponding second crease line.
[0030] In one embodiment, there is a spacing between one end of the second cutting line, which faces away from the second edge, and the position where it is connected to the corresponding second crease line and the third crease line.
[0031] A battery, characterized in that it includes a battery body and the insulating film described in any of the above embodiments. The battery body has a first side, a second side, a third side, a fourth side, and a top surface;
[0032] The insulating film wraps the battery body to form a use state. In the use state, the third side coverage area wraps the third side, the first side coverage area folds along the corresponding second crease line to wrap the first side, the second side coverage area folds along the corresponding second crease line to wrap the second side, and the two fourth side coverage areas fold along the corresponding second crease lines to jointly wrap the fourth side.
[0033] An electrical device includes the battery described in any of the above embodiments.
[0034] In the above-mentioned insulating film, battery and electrical equipment in the usage state, the first cutting line of the first folding area is located at the top corner of the battery body, so that the first folding area is divided into two parts by the first cutting line at the top corner of the battery body. Thus, the two parts can be successively covered on the top surface of the battery body, making the first folding area of the insulating film fit more smoothly with the top surface of the battery body at the top corner of the battery body, avoiding the situation where the two non-adhesive surfaces of the insulating film overlap, and greatly reducing the risk of the insulating film warping. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 FIG. 6 is a schematic structural view of an insulating film in an embodiment of the present invention (in an unfolded state);
[0036] Figure 2 is Figure 1 a schematic structural view of the insulating film shown before wrapping the battery body;
[0037] Figure 3 is Figure 1 a schematic structural view of the insulating film shown after wrapping the battery body;
[0038] Figure 4 FIG. 11 is a schematic structural view of an insulating film in another embodiment of the present invention (in an unfolded state);
[0039] Figure 5 FIG. 13 is a schematic structural view of an insulating film in another embodiment of the present invention (in an unfolded state);
[0040] Figure 6 FIG. 15 is a schematic structural view of an insulating film in another embodiment of the present invention (in an unfolded state);
[0041] Figure 7 is Figure 6 a schematic structural view of the insulating film shown before wrapping the battery body;
[0042] Figure 8 is Figure 6 a schematic structural view of the insulating film shown after wrapping the battery body;
[0043] Figure 9 FIG. 17 is a schematic structural view of an insulating film in another embodiment of the present invention (in an unfolded state);
[0044] Figure 10 FIG. 19 is a schematic structural view of an insulating film in another embodiment of the present invention (in an unfolded state). DETAILED DESCRIPTION OF THE EMBODIMENTS
[0045] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following describes in detail the specific embodiments of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0046] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0048] In the present utility model, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0049] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.
[0051] Please refer to Figures 1 to 3 , an embodiment of the present utility model provides a battery, which includes a battery body 20 and an insulating film 10. The insulating film 10 is wrapped around the outer surface of the battery body 20 to play roles such as insulation and protection. Optionally, the battery body 20 may include a housing, a battery cell assembly and a top cover assembly. One end of the housing has an opening, and the battery cell assembly is placed into the housing through the opening. The top cover assembly is provided at the opening to seal the battery cell assembly in the housing. The top cover assembly has a pole column, and the tab of the battery cell assembly is electrically connected to the pole column to achieve the input or output of electrical energy.
[0052] It can be understood that one side of the insulating film 10 is an adhesive side, and the other side is a non-adhesive side. When the insulating film 10 is wrapped around the outer surface of the battery body 20, it is adhered to the outer surface of the battery body 20 through the adhesive side.
[0053] Please continue to refer to Figures 1 to 3In some embodiments, the insulating film 10 can be wrapped on the battery body 20 in a U-shaped wrapping manner. Specifically, the insulating film 10 has a first fold line L1 and two second fold lines L2. The first fold line L1 passes through both sides of the insulating film 10 along the first direction X1. The two second fold lines L2 are located on the same side of the first fold line L1 and both extend longitudinally along the second direction X2 intersecting the first direction X1. One end of each second fold line L2 is connected to the first fold line L1. The insulating film 10 is formed into a first side covering area 11, two third side covering areas 12 and a first folding area 13 by the first fold line L1 and the two second fold lines L2. The first side covering area 11 is located between the two second fold lines L2, the two third side covering areas 12 are respectively located on the outside of the two second fold lines L2, and the first folding area 13 is located on the side of the first fold line L1 away from the two second fold lines L2. Preferably, the first direction X1 is perpendicular to the second direction X2.
[0054] The insulating film 10 further has a first edge 14 and two first cutting lines L5. The first edge 14 is located on the side of the first fold line L1 away from the two second fold lines L2. The two first cutting lines L5 are located in the first folding area 13. The two first cutting lines L5 correspond one-to-one with the two second fold lines L2. One end of each first cutting line L5 is located at the first edge 14, and the other end of each first cutting line L5 extends to the position where the corresponding second fold line L2 connects to the first fold line L1.
[0055] Furthermore, the battery body 20 has a first side surface A1, a second side surface A2, a third side surface A3, a fourth side surface A4, a top surface A5 and a bottom surface A6. The first side surface A1 and the second side surface A2 serve as the two side surfaces of the battery body 20 in the thickness direction, respectively. The third side surface A3 and the fourth side surface A4 serve as the two side surfaces of the battery body 20 in the length direction, respectively. The top surface A5 and the bottom surface A6 serve as the two side surfaces of the battery body 20 in the height direction, respectively. The insulating film 10 wraps the battery body 20 and forms a use state. In the use state, the first side covering area 11 of the insulating film 10 wraps the first side surface A1 of the battery body 20, and the two third side covering areas 12 of the insulating film 10 are folded onto the third side surface A3 and the fourth side surface A4 of the battery body 20, respectively, so that the two third side covering areas 12 of the insulating film 10 respectively wrap part of the third side surface A3 and part of the fourth side surface A4 of the battery body 20. The first folding area 13 of the insulating film 10 is folded onto the top surface A5 of the battery body 20 along the first folding line L1, so that the first folding area 13 of the insulating film 10 covers the periphery of the top surface A5 of the battery body 20, and the two first cutting lines L5 on the first folding area 13 are respectively located at the two corners of the top surface A5 of the battery body 20.
[0056] Thus, in the use state, the first cut line L5 of the first folded edge area 13 is located at the corner of the top surface A5 of the battery body 20, so that the first folded edge area 13 is divided into two parts by the first cut line L5 at the corner of the top surface A5 of the battery body 20. Thus, the two parts can be successively covered on the top surface A5 of the battery body 20, so that the first folded edge area 13 of the insulating film 10 fits more smoothly with the top surface A5 of the battery body 20 at the corner of the top surface A5 of the battery body 20, avoiding the situation of overlapping of the two non-adhesive surfaces of the insulating film 10 and greatly reducing the risk of the insulating film 10 warping.
[0057] Please refer to Figure 1 As shown, optionally, each first cut line L5 inclines towards the side close to the other second fold line L2 relative to the corresponding second fold line L2. Thus, the first folded edge area 13 is divided by the two first cut lines L5 into a first part connected to the first side covering area 11 and two second parts respectively connected to the two third side covering areas 12. When covering the insulating film 10 on the battery body 20, first attach the two second parts to the top surface A5 of the battery body 20, and then attach the first part to the top surface A5 of the battery body 20, so that the sharp corners at the corners of the top surface A5 of the battery body 20 where the second parts are located are pressed under the first part, further making the first folded edge area 13 of the insulating film 10 fit more smoothly with the top surface A5 of the battery body 20 at the corners of the top surface A5 of the battery body 20. Preferably, each first cut line L5 inclines 45° towards the side close to the other second fold line L2 relative to the corresponding second fold line L2.
[0058] Please refer to Figure 4 As shown, optionally, each first cut line L5 inclines towards the side away from the other second fold line L2 relative to the corresponding second fold line L2. Thus, the first folded edge area 13 is divided by the two first cut lines L5 into a first part connected to the first side covering area 11 and two second parts respectively connected to the two third side covering areas 12. When covering the insulating film 10 on the battery body 20, first attach the first part to the top surface A5 of the battery body 20, and then attach the two second parts to the top surface A5 of the battery body 20, so that the sharp corners at the corners of the top surface A5 of the battery body 20 where the first part is located are pressed under the second parts, further making the first folded edge area 13 of the insulating film 10 fit more smoothly with the top surface A5 of the battery body 20 at the corners of the top surface A5 of the battery body 20. Preferably, each first cut line L5 inclines 45° towards the side away from the other second fold line L2 relative to the corresponding second fold line L2.
[0059] Please refer to Figure 5As shown, optionally, each first cut line L5 is parallel to the corresponding second crease line L2. Thus, the first crease area 13 is divided by the two first cut lines L5 into a first part connected to the first side covering area 11 and two second parts respectively connected to the two third side covering areas 12. There are no sharp corners at the corners of the top surface A5 of the battery body 20 for the first part and the second parts. Therefore, when the insulating film 10 is wrapped around the battery body 20, the order of attaching the first part to the top surface A5 of the battery body 20 and attaching the second parts to the top surface A5 of the battery body 20 is not particularly limited here.
[0060] Specifically in the embodiment, there is a spacing between the end of the first cut line L5 away from the first edge 14 and the position where the corresponding second crease line L2 and the first crease line L1 are connected. On the one hand, it avoids leakage at the position where the second crease line L2 and the first crease line L1 are connected when the insulating film 10 is in use, thereby avoiding the phenomenon of poor insulation; on the other hand, it is beneficial to reduce the difficulty of cutting to form the first cut line L5.
[0061] Please continue to refer to Figures 1 to 3 As shown, specifically in the embodiment, the insulating film 10 further has a third crease line L3 and two fourth crease lines L4 that both penetrate through the two side edges of the insulating film 10 along the first direction X1. The two fourth crease lines L4 are located between the first crease line L1 and the third crease line L3. One end of each second crease line L2 away from the first crease line L1 is connected to the third crease line L3. The area of the insulating film 10 between the two second crease lines L2 is divided by the first crease line L1, the two fourth crease lines L4, and the third crease line L3 into a first side covering area 11, a bottom covering area 16, a second side covering area 15, and two fourth side covering areas 17. The bottom covering area 16 is located between the first side covering area 11 and the second side covering area 15. The two fourth side covering areas 17 are located between the adjacent third crease line L3 and fourth crease line L4, and are respectively located outside the two second crease lines L2.
[0062] Furthermore, the insulating film 10 is separated by the third crease line L3 to form a second crease area 18 on the side of the third crease line L3 away from the two second crease lines L2. The insulating film 10 further has a second edge 19 on the side of the third crease line L3 away from the two second crease lines L2 and two second cut lines L6 located in the second crease area 18. The two second cut lines L6 correspond to the two second crease lines L2 one by one. One end of each second cut line L6 is located at the second edge 19, and the other end of each second cut line L6 extends towards the position where the corresponding second crease line L2 and the third crease line L3 are connected.
[0063] Thus, in the usage state, the first side covering area 11 of the insulating film 10 wraps the first side A1 of the battery body 20, the bottom covering area 16 of the insulating film 10 wraps the bottom A6 of the battery body 20, the second side covering area 15 of the insulating film 10 wraps the second side A2 of the battery body 20, and the two third side covering areas 12 of the insulating film 10 are respectively folded along the second crease line L2 onto the third side A3 and the fourth side A4 of the battery body 20, so that the two third side covering areas 12 of the insulating film 10 respectively wrap parts of the third side A3 and the fourth side A4. The two fourth side covering areas 17 of the insulating film 10 are respectively folded along the second crease line L2 onto the third side A3 and the fourth side A4 of the battery body 20, so that the two fourth side covering areas 17 of the insulating film 10 respectively wrap parts of the third side A3 and the fourth side A4. That is to say, one of the third side covering areas 12 and one of the fourth side covering areas 17 jointly cover the third side A3 of the battery body 20, and the other third side covering area 12 and the other fourth side covering area 17 jointly cover the fourth side A4 of the battery body 20.
[0064] The first folding edge area 13 of the insulating film 10 is folded along the first crease line L1 onto the top surface A5 of the battery body 20, so that the first folding edge area 13 covers the periphery of the top surface A5 of the battery body 20, and the two first cutting lines L5 on the first folding edge area 13 are respectively located at two corners of the top surface A5 of the battery body 20. The second folding edge area 18 of the insulating film 10 is folded along the third crease line L3 onto the top surface A5 of the battery body 20, so that the second folding edge area 18 covers the periphery of the top surface A5 of the battery body 20, and the two second cutting lines L6 on the second folding edge area 18 are respectively located at two corners of the top surface A5 of the battery body 20. That is to say, the four peripheral edges on the top surface A5 of the battery body 20 are jointly wrapped by the first folding edge area 13 and the second folding edge area 18.
[0065] Thus, in the usage state, the second cutting line L6 on the second folding edge area 18 is located at the corner of the top surface A5 of the battery body 20, so that the second folding edge area 18 is divided into two parts by the second cutting line L6 at the corner of the top surface A5 of the battery body 20. Thus, the two parts can be successively covered on the top surface A5 of the battery body 20, so that the second folding edge area 18 of the insulating film 10 fits more smoothly with the top surface A5 of the battery body 20 at the corner of the top surface A5 of the battery body 20, avoiding the situation where two non - adhesive surfaces of the insulating film 10 overlap, and greatly reducing the risk of the insulating film 10 warping.
[0066] Please refer to Figure 1As shown, optionally, each second cut line L6 inclines towards the side closer to another second fold line L2 relative to the corresponding second fold line L2. Thus, the second fold border area 18 is divided by the two second cut lines L6 into a third part connected to the second side covering area 15 and two fourth parts respectively connected to the two fourth side covering areas 17. When covering the insulating film 10 on the battery body 20, first attach the two fourth parts to the top surface A5 of the battery body 20, and then attach the third part to the top surface A5 of the battery body 20, such that the sharp corners of the fourth parts are pressed under the third part, further making the second fold border area 18 of the insulating film 10 fit more smoothly with the top surface A5 of the battery body 20 at the corners of the top surface A5 of the battery body 20. Preferably, each second cut line L6 inclines 45° towards the side closer to another second fold line L2 relative to the corresponding second fold line L2.
[0067] Please refer to Figure 4 As shown, optionally, each second cut line L6 inclines towards the side farther from another second fold line L2 relative to the corresponding second fold line L2. Thus, the second fold border area 18 is divided by the two second cut lines L6 into a third part connected to the second side covering area 15 and two fourth parts respectively connected to the two fourth side covering areas 17. When covering the insulating film 10 on the battery body 20, first attach the third part to the top surface A5 of the battery body 20, and then attach the two fourth parts to the top surface A5 of the battery body 20, such that the sharp corners of the third part are pressed under the fourth parts, further making the second fold border area 18 of the insulating film 10 fit more smoothly with the top surface A5 of the battery body 20 at the corners of the top surface A5 of the battery body 20. Preferably, each second cut line L6 inclines 45° towards the side farther from another second fold line L2 relative to the corresponding second fold line L2.
[0068] Please refer to Figure 5 As shown, optionally, each second cut line L6 is parallel to the corresponding second fold line L2, so that the second fold border area 18 is divided by the two second cut lines L6 into a third part connected to the second side covering area 15 and two fourth parts respectively connected to the two fourth side covering areas 17. There are no sharp corners at the corners of the top surface A5 of the battery body 20 for the third part and the fourth parts. Therefore, when covering the insulating film 10 on the battery body 20, the order of attaching the third part to the top surface A5 of the battery body 20 and attaching the fourth part to the top surface A5 of the battery body 20 is not specifically limited here.
[0069] Specifically in the embodiment, there is a spacing between the end of the second cutting line L6 away from the second edge 19 and the position where it is connected to the corresponding second crease line L2 and the third crease line L3. On the one hand, it avoids leakage at the position where the second crease line L2 and the third crease line L3 are connected when the insulating film 10 is in use, thereby avoiding the phenomenon of poor insulation; on the other hand, it is beneficial to reduce the difficulty of cutting to form the second cutting line L6.
[0070] It can be understood that in this embodiment, the first folded edge area 13, the first side covering area 11, the bottom covering area 16, the second side covering area 15, and the second folded edge area 18 of the insulating film 10 are wrapped around the battery body 20 to form a "U" shape, so it is called the U-shaped wrapping method.
[0071] It should be noted that the insulating film 10 is not limited to wrapping the battery body 20 in the U-shaped wrapping method. In some other embodiments, the insulating film 10 can also wrap the battery body 20 in a circular wrapping method. Please refer to Figures 6 to 8 As shown, the insulating film 10 has a first crease line L1 and four second crease lines L2. The first crease line L1 runs through both sides of the insulating film 10 along the first direction X1, and the four second crease lines L2 are on the same side of the first crease line L1 and all extend longitudinally along the second direction X2. One end of each second crease line L2 is connected to the first crease line L1.
[0072] The area of the insulating film 10 on the side of the first crease line L1 facing the four second crease lines L2 is divided by the four second crease lines L2 into two fourth side covering areas 17, one first side covering area 11, one third side covering area 17, and one second side covering area 15. One of the fourth side covering areas 17, the first side covering area 11, the third side covering area 12, the second side covering area 15, and the other fourth side covering area 17 are arranged in sequence along the first direction X1. The area of the insulating film 10 on the side of the first crease line L1 away from the four second crease lines L2 is the first folded edge area 13. The insulating film 10 also has a first edge 14 on the side of the first crease line L1 away from the four second crease lines L2 and four first cutting lines L5 located in the first folded edge area 13 and corresponding to the four second crease lines L2 one by one. One end of each first cutting line L5 is located at the first edge 14, and the other end of each first cutting line L5 extends towards the position where the corresponding second crease line L2 is connected to the first crease line L1.
[0073] In the use state, the first side covering area 11 of the insulating film 10 wraps the first side A1 of the battery body 20, the third side covering area 12 of the insulating film 10 wraps the third side A3 of the battery body 20, the second side covering area 15 of the insulating film 10 wraps the second side A2 of the battery body 20, and the two fourth side covering areas 17 of the insulating film 10 are respectively folded along the corresponding second fold line L2 onto the fourth side A4 of the battery body 20, that is, the two fourth side covering areas 17 of the insulating film 10 jointly wrap the fourth side A4 of the battery body 20. The first folding edge area 13 of the insulating film 10 is folded along the first fold line L1 onto the top surface A5 of the battery body 20, so that the first folding edge area 13 wraps the four peripheral edges of the top surface A5 of the battery body 20, and the four first cutting lines L5 on the first folding edge area 13 are respectively located at the four corners of the top surface A5 of the battery body 20.
[0074] Thus, in the use state, each first cutting line L5 on the first folding edge area 13 is respectively located at each corner of the top surface A5 of the battery body 20, so that the first folding edge area 13 is divided into two parts by the first cutting line L5 at any corner of the top surface A5 of the battery body 20, and thus the two parts can be successively covered on the top surface A5 of the battery body 20, so that the first folding edge area 13 of the insulating film 10 fits more flatly with the top surface A5 of the battery body 20 at the corner of the top surface A5 of the battery body 20, avoiding the situation of overlapping of the two non-adhesive surfaces of the insulating film 10, and greatly reducing the risk of the insulating film 10 warping.
[0075] Please refer to Figure 6 and Figure 9 As shown, optionally, each first cutting line L5 is inclined relative to the corresponding second fold line L2. Thus, the first folding edge area 13 is divided into two mutually separated parts by each first cutting line L5. Since the first cutting line L5 is inclined relative to the corresponding second fold line L2, one of the two parts has a sharp corner and the other part does not have a sharp corner. When wrapping the insulating film 10 on the battery body 20, first attach the part with the sharp corner to the top surface A5 of the battery body 20, and then attach the part without the sharp corner to the top surface A5 of the battery body 20, so that the sharp corner is pressed under the other part, further making the first folding edge area 13 of the insulating film 10 fit more flatly with the top surface A5 of the battery body 20 at the corner of the top surface A5 of the battery body 20. It should be noted that the inclination directions of the respective first cutting lines L5 are not specifically limited herein. Preferably, each first cutting line L5 is inclined 45° relative to the corresponding second fold line L2.
[0076] Please refer to Figure 10As shown, optionally, each first cut line L5 is parallel to the corresponding second fold line L2. Thus, the first fold margin area 13 is divided into two separate parts by each first cut line L5. Since each first cut line L5 is parallel to the corresponding second fold line L2, neither of these two parts has a sharp corner. When wrapping the insulating film 10 around the battery body 20, the order of attaching these two parts to the top surface A5 of the battery body 20 is not specifically limited herein.
[0077] Specifically in the embodiment, there is a spacing between the end of each first cut line L5 facing away from the first edge 14 and the position where the corresponding second fold line L2 and the first fold line L1 are connected. On the one hand, this avoids leakage at the position where the second fold line L2 and the first fold line L1 are connected when the insulating film 10 is in use, thereby avoiding the phenomenon of poor insulation; on the other hand, it is beneficial to reduce the difficulty of cutting to form the first cut line L5.
[0078] Please continue to refer to Figures 6 to 8 , specifically in the embodiment, the insulating film 10 also has a third fold line L3 that penetrates the opposite side edges of the insulating film 10 along the first direction X1. The four second fold lines L2 are located between the first fold line L1 and the third fold line L3. The area of the insulating film 10 on the side of the third fold line L3 away from the four second fold lines L2 is the second fold margin area 18. The insulating film 10 also has a second edge 19 on the side of the third fold line L3 away from the four second fold lines L2 and four second cut lines L6 located in the second fold margin area 18 and corresponding to the four second fold lines L2 one by one. One end of each second cut line L6 is located at the second edge 19, and the other end of each second cut line L6 extends towards the position where the corresponding second fold line L2 and the third fold line L3 are connected.
[0079] In the use state, the first side covering area 11 of the insulating film 10 wraps the first side A1 of the battery body 20, the third side covering area 12 of the insulating film 10 wraps the third side A3 of the battery body 20, the second side covering area 15 of the insulating film 10 wraps the second side A2 of the battery body 20, and the two fourth side covering areas 17 of the insulating film 10 are respectively folded along the corresponding second crease line L2 onto the fourth side A4 of the battery body 20, that is, the two fourth side covering areas 17 of the insulating film 10 jointly wrap the fourth side A4 of the battery body 20. The first folding edge area 13 of the insulating film 10 is folded along the first crease line L1 onto the top surface A5 of the battery body 20, so that the first folding edge area 13 wraps the four peripheral edges of the top surface A5 of the battery body 20, and the four first cutting lines L5 on the first folding edge area 13 are respectively located at the four corners of the top surface A5 of the battery body 20. The second folding edge area 18 of the insulating film 10 is folded along the third crease line L3 onto the bottom surface A6 of the battery body 20, so that the second folding edge area 18 wraps the four peripheral edges of the bottom surface A6 of the battery body 20, and the four second cutting lines L6 on the second folding edge area 18 are respectively located at the four corners of the bottom surface A6 of the battery body 20.
[0080] In this way, in the use state, each second cutting line L6 on the second folding edge area 18 is respectively located at each corner of the bottom surface A6 of the battery body 20, so that the second folding edge area 18 is divided into two parts by the second cutting line L6 at any corner of the bottom surface A6 of the battery body 20. Thus, the two parts can be successively covered on the bottom surface A6 of the battery body 20, so that the first folding edge area 13 of the insulating film 10 fits more smoothly with the bottom surface of the battery body 20 at the corner of the bottom surface A6 of the battery body 20, avoiding the situation where two non - adhesive surfaces of the insulating film 10 overlap, and greatly reducing the risk of the insulating film 10 warping.
[0081] Please refer to Figure 6 and Figure 9 , optionally, each second cutting line L6 is inclined relative to the corresponding second crease line L2. In this way, the second folding edge area 18 is divided into two separated parts by each second cutting line L6. Since the second cutting line L6 is inclined relative to the corresponding second crease line L2, one of the two parts has a sharp corner and the other part does not have a sharp corner. When wrapping the insulating film 10 around the battery body 20, first attach the part with the sharp corner to the bottom surface A6 of the battery body 20, and then attach the part without the sharp corner to the bottom surface A6 of the battery body 20, so that the sharp corner is pressed under the other part, further making the second folding edge area 18 of the insulating film 10 fit more smoothly with the bottom surface A6 of the battery body 20 at the corner of the bottom surface A6 of the battery body 20. It should be noted that the inclination direction of each first cutting line L5 is not specifically limited here. Preferably, each second cutting line L6 is inclined 45° relative to the corresponding second crease line L2.
[0082] Please refer to Figure 10 , optionally, each second cut line L6 is parallel to the corresponding second fold line L2. Thus, the second fold edge area 18 is divided into two separate parts by each second cut line L6. Since each second cut line L6 is parallel to the corresponding second fold line L2, neither of these two parts has a sharp corner. When wrapping the insulating film 10 around the battery body 20, the order of attaching these two parts to the bottom surface A6 of the battery body 20 is not specifically limited herein.
[0083] Specifically in the embodiment, there is a spacing between the end of each second cut line L6 facing away from the second edge 19 and the position where the corresponding second fold line L2 and the third fold line L3 are connected. On the one hand, this avoids leakage at the position where the second fold line L2 and the third fold line L3 are connected when the insulating film 10 is in use, thereby avoiding the phenomenon of poor insulation; on the other hand, it is beneficial to reduce the difficulty of cutting to form the second cut line L6.
[0084] It can be understood that one of the fourth side covering areas 17, the first side covering area 11, the third side covering area 12, the second side covering area 15, and the other fourth side covering area 17 of the insulating film 10 wrap around the battery body 20 to form a ring, thus it is called the ring-shaped coating method.
[0085] Based on the above battery, an electrical device is also provided in an embodiment of the present application. The electrical device includes the battery described in any of the above embodiments, and the electrical device uses this battery as a power source. Specifically, the electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, and a planer, etc. The embodiments of the present application do not specifically limit the above electrical devices.
[0086] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope described in this specification.
[0087] The above-described embodiments merely represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.
Claims
1. An insulating film, characterized in that, The insulating film (10) has a first crease line (L1) and two second crease lines (L2). The first crease line (L1) penetrates through both side edges of the insulating film (10) along a first direction (X1). The two second crease lines (L2) are located on the same side of the first crease line (L1) and both extend longitudinally along a second direction (X2) intersecting with the first direction (X1). One end of each second crease line (L2) is connected to the first crease line (L1). The insulating film (10) is separated by the first crease line (L1) and the two second crease lines (L2) to form a first side covering area (11), two third side covering areas (12), and a first folding edge area (13). The first side covering area (11) is located between the two second crease lines (L2). The two third side covering areas (12) are respectively located outside the two second crease lines (L2). The first folding edge area (13) is located on the side of the first crease line (L1) away from the two second crease lines (L2). The insulating film (10) further has a first edge (14) located on the side of the first crease line (L1) away from the two second crease lines (L2) and two first cutting lines (L5) located in the first folding edge area (13). The two first cutting lines (L5) correspond to the two second crease lines (L2) one by one. One end of each first cutting line (L5) is located at the first edge (14), and the other end of each first cutting line (L5) extends towards the position where the corresponding second crease line (L2) is connected to the first crease line (L1).
2. The insulating film according to claim 1, wherein Each first cutting line (L5) is inclined towards the side closer to the other second crease line (L2) relative to the corresponding second crease line (L2); or Each first cutting line (L5) is inclined towards the side away from the other second crease line (L2) relative to the corresponding second crease line (L2); or Each first cutting line (L5) is parallel to the corresponding second crease line (L2).
3. The insulating film according to claim 1, characterized in that, There is a spacing between the end of the first cutting line (L5) away from the first edge (14) and the position where the corresponding second crease line (L2) is connected to the first crease line (L1).
4. The insulating film according to claim 1, characterized in that, The insulating film (10) further has a third crease line (L3) and two fourth crease lines (L4) that both penetrate through both side edges of the insulating film (10) along the first direction (X1). The two fourth crease lines (L4) are located between the first crease line (L1) and the third crease line (L3). One end of each second crease line (L2) away from the first crease line (L1) is connected to the third crease line (L3). The region of the insulating film (10) located between the two second crease lines (L2) is divided by the first crease line (L1), the two fourth crease lines (L4), and the third crease line (L3) into a first side covering region (11), a bottom covering region (16), a second side covering region (15), and two fourth side covering regions (17). The bottom covering region (16) is located between the first side covering region (11) and the second side covering region (15). The two fourth side covering regions (17) are located between the adjacent third crease line (L3) and fourth crease line (L4), and are respectively located outside the two second crease lines (L2).
5. The insulating film according to claim 4, wherein The insulating film (10) is divided by the third crease line (L3) to form a second crease border region (18) on the side of the third crease line (L3) facing away from the two second crease lines (L2). The insulating film (10) also has a second edge (19) on the side of the third crease line (L3) facing away from the two second crease lines (L2), and two second cutting lines (L6) located in the second crease border region (18). The two second cutting lines (L6) correspond to the two second crease lines (L2) one by one. One end of each second cutting line (L6) is located at the second edge (19), and the other end of each second cutting line (L6) extends towards the position where the corresponding second crease line (L2) is connected to the third crease line (L3).
6. The insulating film according to claim 5, wherein Each second cutting line (L6) is inclined towards the side closer to the other second crease line (L2) relative to the corresponding second crease line (L2); or Each second cutting line (L6) is inclined towards the side away from the other second crease line (L2) relative to the corresponding second crease line (L2); or Each second cutting line (L6) is parallel to the corresponding second crease line (L2).
7. The insulating film according to claim 5, characterized in that, There is a spacing between the end of the second cutting line (L6) facing away from the second edge (19) and the position where the corresponding second crease line (L2) is connected to the third crease line (L3).
8. An insulating film, characterized in that, The insulating film (10) has a first crease line (L1) and four second crease lines (L2). The first crease line (L1) penetrates through the two side edges of the insulating film (10) along the first direction (X1). The four second crease lines (L2) are located on the same side of the first crease line (L1), and all extend longitudinally along a second direction (X2) intersecting with the first direction (X1). One end of each second crease line (L2) is connected to the first crease line (L1); The insulating film (10) is located on a side of the first folding line (L1) facing the four second folding lines (L2), and is divided by the four second folding lines (L2) into two fourth side covering areas (17), one first side covering area (11), one third side covering area (12), and one second side covering area (15), wherein one of the fourth side covering areas (17), the first side covering area (11), the third side covering area (12), the second side covering area (15), and another of the fourth side covering areas (17) are arranged in sequence along the first direction (X1); The insulating film (10) is located in a region on the side of the first fold line (L1) away from the four second fold lines (L2) as a first folding area (13). The insulating film (10) also has a first edge (14) located on the side of the first fold line (L1) away from the four second fold lines (L2) and four first cutting lines (L5) located in the first folding area (13) and corresponding to the four second fold lines (L2) one by one. One end of each first cutting line (L5) is located at the first edge (14), and the other end of each first cutting line (L5) extends toward the position where the corresponding second fold line (L2) is connected to the first fold line (L1).
9. The insulating film according to claim 8, wherein Each of the first cutting lines (L5) is inclined relative to the corresponding second folding line (L2); or Each of the first cutting lines (L5) is parallel to the corresponding second folding line (L2).
10. The insulating film according to claim 8, wherein, There is a distance between the end of each first cutting line (L5) facing away from the first edge (14) and the position where the corresponding second folding line (L2) and the first folding line (L1) are connected.
11. The insulating film according to claim 8, wherein The insulating film (10) further comprises a third fold line (L3) passing through two sides of the insulating film (10) along the first direction (X1), and four second fold lines (L2) are located between the first fold line (L1) and the third fold line (L3); The insulating film (10) is located in an area on the side of the third fold line (L3) away from the four second fold lines (L2) as a second folding area (18). The insulating film (10) also has a second edge (19) located on the side of the third fold line (L3) away from the four second fold lines (L2) and four second cutting lines (L6) located in the second folding area (18) and corresponding to the four second fold lines (L2) one by one. One end of each second cutting line (L6) is located at the second edge (19), and the other end of each second cutting line (L6) extends toward the position where the corresponding second fold line (L2) is connected to the third fold line (L3).
12. The insulating film according to claim 11, wherein Each of the second cutting lines (L6) is inclined relative to the corresponding second folding line (L2); or Each of the second cutting lines (L6) is parallel to the corresponding second folding line (L2).
13. The insulating film according to claim 11, wherein, There is a spacing between the end of the second cutting line (L6) facing away from the second edge (19) and the position where it is connected to the corresponding second crease line (L2) and the third crease line (L3).
14. A battery, characterized in that, Comprising a battery body (20) and an insulating film (10) as described in any one of claims 1 to 7, the battery body (20) having a first side surface (A1), a third side surface (A3), a fourth side surface (A4), and a top surface (A5); The insulating film (10) wraps the battery body (20) and forms a use state. In this use state, the first side surface covering area (11) wraps the first side surface (A1), and the two third side surface covering areas (12) are respectively folded along the two second crease lines (L2) to wrap parts of the third side surface (A3) and the fourth side surface (A4), and the first folding edge area (13) is folded along the first crease line (L1) to cover the periphery of the top surface (A5).
15. A battery, characterized in that, Comprising a battery body (20) and an insulating film (10) as described in any one of claims 8 to 13, the battery body (20) having a first side surface (A1), a second side surface (A2), a third side surface (A3), a fourth side surface (A4), and a top surface (A5); The insulating film (10) wraps the battery body (20) and forms a use state. In this use state, the third side surface covering area (12) wraps the third side surface (A3), the first side surface covering area (11) is folded along the corresponding second crease line (L2) to wrap the first side surface (A1), the second side surface covering area (15) is folded along the corresponding second crease line (L2) to wrap the second side surface (A2), and the two fourth side surface covering areas (17) are respectively folded along the corresponding second crease line (L2) to jointly wrap the fourth side surface (A4).
16. An electrical device, characterized in that, Comprising a battery as described in claim 14 or 15.